All categories

3 years ago

Could the other molecules in this simulation (argon, oxygen, and water) be considered pure substances? Explain your thinking.

Chemistry

1 answer:

Komok [63]3 years ago

5 0

Answer:

A water molecule consists of three atoms; an oxygen atom and two hydrogen atoms, which are bond together like little magnets. The atoms consist of matter that has a nucleus in the centre. The difference between atoms is expressed by atomic numbers. ... There are also uncharged particles in the nucleus, called neutrons.

Explanation:

You might be interested in

ANSWER AS SOON AS POSSIBLE PLEASE!!!! Which type of water represents the largest percentage of earths water?

antoniya [11.8K]

Answer:

im pretty sure its groundwater just read this and see the answer

Explanation:

The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.

5 0

3 years ago

Read 2 more answers

An electron in an unknown energy level of a hydrogen atom transitions to the n=2 level and emits a photon with wavelength 410 nm

scoray [572]

Answer:

THE INITIAL ENERGY LEVEL OF THE ELECTRON IS 1

Explanation:

Basically, the electron from the hydrogen atom moves from an unknown energy level to energy level 2, and the formula for calculating wavelength when the energy levels are given is;

$\frac{1}y} = Rh Z^{2} (\frac{1}{n1^{2} } - \frac{1}{n2^{2} })$

y = wavelength = 410 nm = 410 *10^-9 m

Rh = Rydberg constant of hydrogen atom = 1.097 *10^7 m^-1

Z = atomic number of hydrogen = 1

n1 = initial energy level = ?

n2 = final energy level = 2

Substituting the values into the equation we get;

1 / 410 * 10^-9 = (1.097 *10^7) * (1^2) * ( 1 / n1^2 - 1 / 2^2)

1/ (410 *10^-9) (1.097 *10^7) = 1 /n1^2 - 1/ n2^2

1 / 4.4977 = 1/ n1^2 - 1/ 4

i/n1^2 = 1/4.4977 + 1/4

1 /n1^2 = 8.4977 / 17.9908

n1^2 = 17.9908 /8.4977;

n1^2 = 2.1171

n1 = square root of 2.1171

n1 = 1.455

n1 is approximately ≅ 1

So therefore the initial energy level of the electron in the hydrogen atom is 1

8 0

3 years ago

How does a lone pair distort the molecular shape?

Paul [167]

Answer:

D. The lone pair forces bonding atoms away from itself.

Explanation:

The lone pairs are found in the outermost shell thereby making sharing of electrons easier. Lone pairs which are found in a covalent bond creates a bond angle which makes it a determinant of the bond angle.

The lone pairs which are negatively charged repulses the bond pairs thereby creating a distortion in the shape of the molecule.

The lone pairs creates the distortion by forcing bonding atoms away from itself.

6 0

3 years ago

How do you think electricity and magnetism are connected?

Lunna [17]

Answer:

Electricity and magnetism are closely related. Flowing electrons produce a magnetic field, and spinning magnets cause an electric current to flow. Electromagnetism is the interaction of these two important forces.

Explanation:

6 0

3 years ago

The element vanadium had a line with a wavelength of 318.5 nm in its emission spectrum. What is the frequency of this line

Hunter-Best [27]

The frequency of this line of vanadium is 9.38 x10 ^14 Hz.

Emission spectrum shows how the electron of an atom goes or moves from a higher to a lower energy level.

Now The energy of a photon is given by

E = hc/λ

where

h = Plank's constant = 6.626 x 10⁻³⁴ J s

c = speed of light= 3 x 10⁸ m/s

λ = wavelength = 318.5 x 10⁻⁹ m

Solving

E = (6.626 x 10⁻³⁴ J s x 3 x 10⁸ m/s) / 318.5 x 10⁻⁹ m

E =6.2166 x10 ^-19 J

Also, we know that energy is related to frequency by the equation

E =hf

Where;

h = Planks's constant

f = frequency of photon

Making frequency subject of the formulae

f = E/h

f =6.2166 x10 ^-19 J/ 6.626 x 10⁻³⁴ J s

f = 9.38 x10 ^14 Hz

See similar question and solution here:brainly.com/question/24630281

7 0

3 years ago